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公开(公告)号：US3371233A
公开(公告)日：1968-02-27
申请号：US46731965
申请日：1965-06-28
Applicant: EDWARD G. COOK
Inventor： COOK EDWARD G
CPC classification number: B06B1/0648 , B06B1/0276 , B06B2201/20 , B06B2201/71
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